System Diagram

(1) Engine control module (ECM)
(2) Ignition coil
(3) Ignitor
(4) Crankshaft position sensor 1
(5) Crankshaft position sensor 2
(6) Camshaft position sensor
(7) Throttle position sensor
(8) Fuel injectors
(9) Pressure regulator
(10) Engine coolant temperature sensor
(11) Mass air flow sensor
(12) Idle air control solenoid valve
(13) Purge control solenoid valve
(14) Fuel pump
(15) PCV valve
(16) Air cleaner
(17) Canister
(18) Main relay
(19) Fuel pump relay
(20) Fuel filter
(21) Front catalytic converter (RH)
(22) Front catalytic converter (LH)
(23) Rear catalytic converter
(24) EGR valve
(25) EGR control solenoid valve
(26) Radiator fan
(27) Radiator fan relay
(28) Pressure sources switching solenoid valve
(29) Knock sensor 1
(30) Knock sensor 2
(31) Back-pressure transducer (BPT)
(32) Front oxygen sensor 1 (RH)
(33) Front oxygen sensor 2 (LH)
(34) Pressure sensor
(35) A/C compressor
(36) [1][2]Inhibitor switch
(37) CHECK ENGINE malfunction indicator lamp (MIL)
(38) Tachometer
(39) A/C relay
(40) A/C control module
(41) Ignition switch
(42) Transmission control module (TCM)
(43) Vehicle speed sensor 2
(44) Data link connector (For Subaru select monitor)
(45) Data link connector (For Subaru select monitor and OBD-II general scan tool)
(46) Two-way valve
(47) Rear oxygen sensor
(48) Filter
(49) Auxiliary air control valve
(50) Induction control solenoid valve
(51) Vacuum tank
(52) Check valve
(53) Induction control valve
(54) Induction valve diaphragm
(55) Resistor
(56) Fuel pump modulator
(57) Spark plug